Couple things to keep in mind:
The TV viewership ratings changed a couple of years ago (2020-ish?) to include "non=-traditional" viewers (They have some actual term for it, which I can't recall, but basically people other than those sitting down at home and watching the game on TV).
So all the numbers since that time are inflated over the numbers pre-2020ish.
That said, for the major bowls (NY6) one can expect to see bumps for the next few years as they all become "playoff" games - as opposed to what they are now.
The real juice is how many folks watch throughout the total season. I don't know what those figures are, but I wouldn't be surprised if they are up somewhat (certainly with the new calculation metrics, and more time slots in use, and maybe even without that). I expect any "drop offs" will hit TV viewership numbers last (a lagging item) - and actual attendance will be the "canary in the coal mine" indicator - if there is indeed a drop off.
Peach Bowl was a modest 7.7 million. Lower than the blowout FSU/Georgia bowl.